作者
Irshad Ahmad Ansari, Millie Pant, Chang Wook Ahn
发表日期
2015
期刊
International Journal of Machine Learning and Cybernetics
页码范围
1-15
出版商
Springer Berlin Heidelberg
简介
This paper proposes a novel fragile watermarking approach for digital image tamper localization (TL) along with the self-recovery (SR) capability. The host image is first divided into blocks of size 4 × 4 and then, singular value decomposition is performed on each block. The trace of singular matrix is used to compute the TL bits for each block. These 4 × 4 blocks are further divided into blocks of size 2 × 2 to compute the SR information. This SR information is also used for 2nd level of tamper detection in order to enhance the resolution of TL. Proposed scheme implements a self-embedding of TL bits and mapped embedding of SR bits and for that, block mapping is performed. The encrypted combination of both the codes (TL of parent block + SR of mapped block) is inserted in the 1st and 2nd least significant bits of the parent block. Encryption of watermark bits (unique for each watermarked image) helps it to …
引用总数
20162017201820192020202120222023202486141419182395
学术搜索中的文章
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